fix: Refresh Mark & Mark window lag spike

Added Server-Side mark broadcast

src/UserInterface/Packet.h

@@ -240,6 +240,7 @@ enum
 	HEADER_GC_MARK_BLOCK						= 100,
 	HEADER_GC_MARK_DIFF_DATA                    = 101,
 	HEADER_GC_MARK_IDXLIST						= 102,
+	HEADER_GC_MARK_UPDATE						= 103,
 
 	//HEADER_GC_SLOW_TIMER						= 105,
     HEADER_GC_TIME                              = 106,
@@ -412,6 +413,13 @@ typedef struct packet_mark_block
     // 뒤에 64 x 48 x 픽셀크기(4바이트) = 12288만큼 데이터 붙음
 } TPacketGCMarkBlock;
 
+typedef struct packet_mark_update
+{
+	uint8_t		header;
+	uint32_t	guildID;
+	uint16_t	imgIdx;
+} TPacketGCMarkUpdate;
+
 typedef struct command_symbol_upload
 {
 	uint8_t	header;